implement uncloudd daemon that starts a WireGuard network without peer probing

cmd/uncloudd/main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"github.com/spf13/cobra"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+	"uncloud/internal/machine"
+	"uncloud/internal/machine/daemon"
+)
+
+func main() {
+	var dataDir string
+	cmd := &cobra.Command{
+		Use:           "uncloudd",
+		Short:         "Uncloud machine daemon.",
+		SilenceUsage:  true,
+		SilenceErrors: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return daemon.Run(cmd.Context(), dataDir)
+		},
+	}
+	cmd.PersistentFlags().StringVarP(&dataDir, "data-dir", "d", machine.DefaultDataDir,
+		"Directory for storing persistent machine state")
+	_ = cmd.MarkFlagDirname("data-dir")
+
+	// ctx is canceled when the daemon command is interrupted.
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Handle interrupt signals and cancel the context.
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		sig := <-sigs
+		slog.Info("Received signal, stopping daemon.", "signal", sig)
+		cancel()
+	}()
+
+	cobra.CheckErr(cmd.ExecuteContext(ctx))
+	slog.Info("Daemon stopped.")
+}